The Bills are better than what their record says they are and can't be taken lightly. But also have been inconsistent this season. As we don't know which Bills team will show up. I know that some think or expect the Cowboys to put out a bad game once they start to get some media love after going on a winning streak. But the Bills this season have been the type of team who has put up some impressive performances against the better teams they have played this season.
Just to follow them up with an bad performance or loss. Like them beating the Dolphins 48-20, just to lose to the Jaguars the following game. And then come within a bad call of losing to the Giants a week after that. Finding a way to beat the Bucs. But then losing in back to back games against the Bengals and Broncos. This inconsistency is probably why there are some Bills fans who are as unsure about their team winning this game as Cowboys fans are about Dallas winning it.